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  4. 岩石圈演化国家重点实验室
Improved full waveform moment tensor inversion of Cratonic intraplate earthquakes in southwest Australia

文献类型：期刊论文

作者Lin, Xiangdong3,4,5,6; Yuan, Huaiyu1,4,5; Dentith, Michael C.5; Murdie, Ruth1; Gessner, Klaus1; Nayak, Avinash2
刊名GEOPHYSICAL JOURNAL INTERNATIONAL
出版日期2021-10-01
卷号227期号:1页码:123-145
ISSN号0956-540X
关键词Waveform inversion Earthquake source observations Seismicity and tectonics Seismic noise Intra-plate processes
DOI10.1093/gji/ggab214
英文摘要In contrast to global observations in stable continental crust, the present-day orientation of the maximum horizontal stress in Western Australia is at a high angle to plate motion, suggesting that in addition to large-scale plate driving forces, local factors also play an important role in stress repartitioning. As a reliable stress indicator, full waveform moment tensor solutions are calculated for earthquakes that occurred between 2010 and 2018 in the southern Yilgam Craton and the adjacent Albany-Fraser Orogen in southwestern Australia. Due to regional velocity heterogeneities in the crust, we produced two geographically distinct shear wave velocity models by combining published crustal velocity models with new ambient noise tomography results. We applied a full waveform inversion technique to 15 local earthquakes and obtained 10 robust results. Three of these events occurred near Lake Muir in the extreme south of the study area within the Albany-Fraser Orogen. The focal mechanism of the 16th September 2018 Lake Muir event is thrust; two M-L >= 4.0 aftershocks are normal and strike-slip. Our results are consistent with field observations, fault orientations inferred from aeromagnetic data and surface displacements mapped by Interferometric Synthetic Aperture Radar which are all consistent with reactivation of existing faults. The other seven solutions are in the southeastern Yilgam Craton. These solutions show that the faulting mechanisms are predominantly thrust and strike-slip. This kinematic framework is consistent with previous studies that linked active seismicity in the Yilgarn Craton to the reactivation of the NNW-SSE oriented Neoarchean structures by an approximately E-W oriented regional stress field. Our results suggest that the kind of faulting that occurs in southwest Australia is critically dependent on the local geological structure. Thrust faulting is the dominant rupture mechanism, with some strike-slip faulting occurring on favourably oriented structures.
WOS关键词STRESS-FIELD ; SOURCE PARAMETERS ; YILGARN CRATON ; LINEAR INVERSION ; MECHANISM ; SEISMICITY ; MODEL ; CRUST
资助项目National Science Foundation of China[41604045] ; National Science Foundation of China[41474087] ; National Science Foundation of China[91955210] ; Science for Earthquake Resilience[XH200103] ; China Scholarship Council ; Australian Government ; Government of Western Australia ; Western Australian Exploration Incentive Scheme (EIS)
WOS研究方向Geochemistry & Geophysics
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:000697668700008
资助机构National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; Science for Earthquake Resilience ; Science for Earthquake Resilience ; Science for Earthquake Resilience ; Science for Earthquake Resilience ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; Australian Government ; Australian Government ; Australian Government ; Australian Government ; Government of Western Australia ; Government of Western Australia ; Government of Western Australia ; Government of Western Australia ; Western Australian Exploration Incentive Scheme (EIS) ; Western Australian Exploration Incentive Scheme (EIS) ; Western Australian Exploration Incentive Scheme (EIS) ; Western Australian Exploration Incentive Scheme (EIS) ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; Science for Earthquake Resilience ; Science for Earthquake Resilience ; Science for Earthquake Resilience ; Science for Earthquake Resilience ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; Australian Government ; Australian Government ; Australian Government ; Australian Government ; Government of Western Australia ; Government of Western Australia ; Government of Western Australia ; Government of Western Australia ; Western Australian Exploration Incentive Scheme (EIS) ; Western Australian Exploration Incentive Scheme (EIS) ; Western Australian Exploration Incentive Scheme (EIS) ; Western Australian Exploration Incentive Scheme (EIS) ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; Science for Earthquake Resilience ; Science for Earthquake Resilience ; Science for Earthquake Resilience ; Science for Earthquake Resilience ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; Australian Government ; Australian Government ; Australian Government ; Australian Government ; Government of Western Australia ; Government of Western Australia ; Government of Western Australia ; Government of Western Australia ; Western Australian Exploration Incentive Scheme (EIS) ; Western Australian Exploration Incentive Scheme (EIS) ; Western Australian Exploration Incentive Scheme (EIS) ; Western Australian Exploration Incentive Scheme (EIS) ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; Science for Earthquake Resilience ; Science for Earthquake Resilience ; Science for Earthquake Resilience ; Science for Earthquake Resilience ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; Australian Government ; Australian Government ; Australian Government ; Australian Government ; Government of Western Australia ; Government of Western Australia ; Government of Western Australia ; Government of Western Australia ; Western Australian Exploration Incentive Scheme (EIS) ; Western Australian Exploration Incentive Scheme (EIS) ; Western Australian Exploration Incentive Scheme (EIS) ; Western Australian Exploration Incentive Scheme (EIS)
源URL[http://ir.iggcas.ac.cn/handle/132A11/102678]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Lin, Xiangdong
作者单位1.Geol Survey Western Australia, East Perth, WA 6004, Australia
2.Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
3.Beijing Earthquake Agcy, Beijing 100080, Peoples R China
4.Macquarie Univ, ARC Ctr Excellence Core Crust Fluid Syst, Dept Earth & Environm Sci, N Ryde, NSW 2019, Australia
5.Univ Western Australia, Ctr Explorat Targeting, Crawley, WA 6009, Australia
6.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Lin, Xiangdong,Yuan, Huaiyu,Dentith, Michael C.,et al. Improved full waveform moment tensor inversion of Cratonic intraplate earthquakes in southwest Australia[J]. GEOPHYSICAL JOURNAL INTERNATIONAL,2021,227(1):123-145.
APA Lin, Xiangdong,Yuan, Huaiyu,Dentith, Michael C.,Murdie, Ruth,Gessner, Klaus,&Nayak, Avinash.(2021).Improved full waveform moment tensor inversion of Cratonic intraplate earthquakes in southwest Australia.GEOPHYSICAL JOURNAL INTERNATIONAL,227(1),123-145.
MLA Lin, Xiangdong,et al."Improved full waveform moment tensor inversion of Cratonic intraplate earthquakes in southwest Australia".GEOPHYSICAL JOURNAL INTERNATIONAL 227.1(2021):123-145.

入库方式： OAI收割

来源：地质与地球物理研究所

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